1 //===--- raw_ostream.cpp - Implement the raw_ostream classes --------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This implements support for bulk buffered stream output.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Support/raw_ostream.h"
15 #include "llvm/ADT/STLExtras.h"
16 #include "llvm/ADT/SmallVector.h"
17 #include "llvm/ADT/StringExtras.h"
18 #include "llvm/Config/config.h"
19 #include "llvm/Support/Compiler.h"
20 #include "llvm/Support/ErrorHandling.h"
21 #include "llvm/Support/FileSystem.h"
22 #include "llvm/Support/Format.h"
23 #include "llvm/Support/FormatVariadic.h"
24 #include "llvm/Support/MathExtras.h"
25 #include "llvm/Support/NativeFormatting.h"
26 #include "llvm/Support/Process.h"
27 #include "llvm/Support/Program.h"
34 #include <system_error>
36 // <fcntl.h> may provide O_BINARY.
37 #if defined(HAVE_FCNTL_H)
41 #if defined(HAVE_UNISTD_H)
45 #if defined(__CYGWIN__)
52 # define STDIN_FILENO 0
55 # define STDOUT_FILENO 1
58 # define STDERR_FILENO 2
63 #include "Windows/WindowsSupport.h"
68 raw_ostream::~raw_ostream() {
69 // raw_ostream's subclasses should take care to flush the buffer
70 // in their destructors.
71 assert(OutBufCur == OutBufStart &&
72 "raw_ostream destructor called with non-empty buffer!");
74 if (BufferMode == InternalBuffer)
75 delete [] OutBufStart;
78 size_t raw_ostream::preferred_buffer_size() const {
79 // BUFSIZ is intended to be a reasonable default.
83 void raw_ostream::SetBuffered() {
84 // Ask the subclass to determine an appropriate buffer size.
85 if (size_t Size = preferred_buffer_size())
88 // It may return 0, meaning this stream should be unbuffered.
92 void raw_ostream::SetBufferAndMode(char *BufferStart, size_t Size,
94 assert(((Mode == Unbuffered && !BufferStart && Size == 0) ||
95 (Mode != Unbuffered && BufferStart && Size != 0)) &&
96 "stream must be unbuffered or have at least one byte");
97 // Make sure the current buffer is free of content (we can't flush here; the
98 // child buffer management logic will be in write_impl).
99 assert(GetNumBytesInBuffer() == 0 && "Current buffer is non-empty!");
101 if (BufferMode == InternalBuffer)
102 delete [] OutBufStart;
103 OutBufStart = BufferStart;
104 OutBufEnd = OutBufStart+Size;
105 OutBufCur = OutBufStart;
108 assert(OutBufStart <= OutBufEnd && "Invalid size!");
111 raw_ostream &raw_ostream::operator<<(unsigned long N) {
112 write_integer(*this, static_cast<uint64_t>(N), 0, IntegerStyle::Integer);
116 raw_ostream &raw_ostream::operator<<(long N) {
117 write_integer(*this, static_cast<int64_t>(N), 0, IntegerStyle::Integer);
121 raw_ostream &raw_ostream::operator<<(unsigned long long N) {
122 write_integer(*this, static_cast<uint64_t>(N), 0, IntegerStyle::Integer);
126 raw_ostream &raw_ostream::operator<<(long long N) {
127 write_integer(*this, static_cast<int64_t>(N), 0, IntegerStyle::Integer);
131 raw_ostream &raw_ostream::write_hex(unsigned long long N) {
132 llvm::write_hex(*this, N, HexPrintStyle::Lower);
136 raw_ostream &raw_ostream::write_uuid(const uuid_t UUID) {
137 for (int Idx = 0; Idx < 16; ++Idx) {
138 *this << format("%02" PRIX32, UUID[Idx]);
139 if (Idx == 3 || Idx == 5 || Idx == 7 || Idx == 9)
146 raw_ostream &raw_ostream::write_escaped(StringRef Str,
147 bool UseHexEscapes) {
148 for (unsigned char c : Str) {
151 *this << '\\' << '\\';
154 *this << '\\' << 't';
157 *this << '\\' << 'n';
160 *this << '\\' << '"';
168 // Write out the escaped representation.
170 *this << '\\' << 'x';
171 *this << hexdigit((c >> 4 & 0xF));
172 *this << hexdigit((c >> 0) & 0xF);
174 // Always use a full 3-character octal escape.
176 *this << char('0' + ((c >> 6) & 7));
177 *this << char('0' + ((c >> 3) & 7));
178 *this << char('0' + ((c >> 0) & 7));
186 raw_ostream &raw_ostream::operator<<(const void *P) {
187 llvm::write_hex(*this, (uintptr_t)P, HexPrintStyle::PrefixLower);
191 raw_ostream &raw_ostream::operator<<(double N) {
192 llvm::write_double(*this, N, FloatStyle::Exponent);
196 void raw_ostream::flush_nonempty() {
197 assert(OutBufCur > OutBufStart && "Invalid call to flush_nonempty.");
198 size_t Length = OutBufCur - OutBufStart;
199 OutBufCur = OutBufStart;
200 write_impl(OutBufStart, Length);
203 raw_ostream &raw_ostream::write(unsigned char C) {
204 // Group exceptional cases into a single branch.
205 if (LLVM_UNLIKELY(OutBufCur >= OutBufEnd)) {
206 if (LLVM_UNLIKELY(!OutBufStart)) {
207 if (BufferMode == Unbuffered) {
208 write_impl(reinterpret_cast<char*>(&C), 1);
211 // Set up a buffer and start over.
223 raw_ostream &raw_ostream::write(const char *Ptr, size_t Size) {
224 // Group exceptional cases into a single branch.
225 if (LLVM_UNLIKELY(size_t(OutBufEnd - OutBufCur) < Size)) {
226 if (LLVM_UNLIKELY(!OutBufStart)) {
227 if (BufferMode == Unbuffered) {
228 write_impl(Ptr, Size);
231 // Set up a buffer and start over.
233 return write(Ptr, Size);
236 size_t NumBytes = OutBufEnd - OutBufCur;
238 // If the buffer is empty at this point we have a string that is larger
239 // than the buffer. Directly write the chunk that is a multiple of the
240 // preferred buffer size and put the remainder in the buffer.
241 if (LLVM_UNLIKELY(OutBufCur == OutBufStart)) {
242 assert(NumBytes != 0 && "undefined behavior");
243 size_t BytesToWrite = Size - (Size % NumBytes);
244 write_impl(Ptr, BytesToWrite);
245 size_t BytesRemaining = Size - BytesToWrite;
246 if (BytesRemaining > size_t(OutBufEnd - OutBufCur)) {
247 // Too much left over to copy into our buffer.
248 return write(Ptr + BytesToWrite, BytesRemaining);
250 copy_to_buffer(Ptr + BytesToWrite, BytesRemaining);
254 // We don't have enough space in the buffer to fit the string in. Insert as
255 // much as possible, flush and start over with the remainder.
256 copy_to_buffer(Ptr, NumBytes);
258 return write(Ptr + NumBytes, Size - NumBytes);
261 copy_to_buffer(Ptr, Size);
266 void raw_ostream::copy_to_buffer(const char *Ptr, size_t Size) {
267 assert(Size <= size_t(OutBufEnd - OutBufCur) && "Buffer overrun!");
269 // Handle short strings specially, memcpy isn't very good at very short
272 case 4: OutBufCur[3] = Ptr[3]; LLVM_FALLTHROUGH;
273 case 3: OutBufCur[2] = Ptr[2]; LLVM_FALLTHROUGH;
274 case 2: OutBufCur[1] = Ptr[1]; LLVM_FALLTHROUGH;
275 case 1: OutBufCur[0] = Ptr[0]; LLVM_FALLTHROUGH;
278 memcpy(OutBufCur, Ptr, Size);
286 raw_ostream &raw_ostream::operator<<(const format_object_base &Fmt) {
287 // If we have more than a few bytes left in our output buffer, try
288 // formatting directly onto its end.
289 size_t NextBufferSize = 127;
290 size_t BufferBytesLeft = OutBufEnd - OutBufCur;
291 if (BufferBytesLeft > 3) {
292 size_t BytesUsed = Fmt.print(OutBufCur, BufferBytesLeft);
294 // Common case is that we have plenty of space.
295 if (BytesUsed <= BufferBytesLeft) {
296 OutBufCur += BytesUsed;
300 // Otherwise, we overflowed and the return value tells us the size to try
302 NextBufferSize = BytesUsed;
305 // If we got here, we didn't have enough space in the output buffer for the
306 // string. Try printing into a SmallVector that is resized to have enough
307 // space. Iterate until we win.
308 SmallVector<char, 128> V;
311 V.resize(NextBufferSize);
313 // Try formatting into the SmallVector.
314 size_t BytesUsed = Fmt.print(V.data(), NextBufferSize);
316 // If BytesUsed fit into the vector, we win.
317 if (BytesUsed <= NextBufferSize)
318 return write(V.data(), BytesUsed);
320 // Otherwise, try again with a new size.
321 assert(BytesUsed > NextBufferSize && "Didn't grow buffer!?");
322 NextBufferSize = BytesUsed;
326 raw_ostream &raw_ostream::operator<<(const formatv_object_base &Obj) {
332 raw_ostream &raw_ostream::operator<<(const FormattedString &FS) {
333 if (FS.Str.size() >= FS.Width || FS.Justify == FormattedString::JustifyNone) {
334 this->operator<<(FS.Str);
337 const size_t Difference = FS.Width - FS.Str.size();
338 switch (FS.Justify) {
339 case FormattedString::JustifyLeft:
340 this->operator<<(FS.Str);
341 this->indent(Difference);
343 case FormattedString::JustifyRight:
344 this->indent(Difference);
345 this->operator<<(FS.Str);
347 case FormattedString::JustifyCenter: {
348 int PadAmount = Difference / 2;
349 this->indent(PadAmount);
350 this->operator<<(FS.Str);
351 this->indent(Difference - PadAmount);
355 llvm_unreachable("Bad Justification");
360 raw_ostream &raw_ostream::operator<<(const FormattedNumber &FN) {
363 if (FN.Upper && FN.HexPrefix)
364 Style = HexPrintStyle::PrefixUpper;
365 else if (FN.Upper && !FN.HexPrefix)
366 Style = HexPrintStyle::Upper;
367 else if (!FN.Upper && FN.HexPrefix)
368 Style = HexPrintStyle::PrefixLower;
370 Style = HexPrintStyle::Lower;
371 llvm::write_hex(*this, FN.HexValue, Style, FN.Width);
373 llvm::SmallString<16> Buffer;
374 llvm::raw_svector_ostream Stream(Buffer);
375 llvm::write_integer(Stream, FN.DecValue, 0, IntegerStyle::Integer);
376 if (Buffer.size() < FN.Width)
377 indent(FN.Width - Buffer.size());
383 raw_ostream &raw_ostream::operator<<(const FormattedBytes &FB) {
384 if (FB.Bytes.empty())
387 size_t LineIndex = 0;
388 auto Bytes = FB.Bytes;
389 const size_t Size = Bytes.size();
390 HexPrintStyle HPS = FB.Upper ? HexPrintStyle::Upper : HexPrintStyle::Lower;
391 uint64_t OffsetWidth = 0;
392 if (FB.FirstByteOffset.hasValue()) {
393 // Figure out how many nibbles are needed to print the largest offset
394 // represented by this data set, so that we can align the offset field
395 // to the right width.
396 size_t Lines = Size / FB.NumPerLine;
397 uint64_t MaxOffset = *FB.FirstByteOffset + Lines * FB.NumPerLine;
400 Power = llvm::Log2_64_Ceil(MaxOffset);
401 OffsetWidth = std::max<uint64_t>(4, llvm::alignTo(Power, 4) / 4);
404 // The width of a block of data including all spaces for group separators.
405 unsigned NumByteGroups =
406 alignTo(FB.NumPerLine, FB.ByteGroupSize) / FB.ByteGroupSize;
407 unsigned BlockCharWidth = FB.NumPerLine * 2 + NumByteGroups - 1;
409 while (!Bytes.empty()) {
410 indent(FB.IndentLevel);
412 if (FB.FirstByteOffset.hasValue()) {
413 uint64_t Offset = FB.FirstByteOffset.getValue();
414 llvm::write_hex(*this, Offset + LineIndex, HPS, OffsetWidth);
418 auto Line = Bytes.take_front(FB.NumPerLine);
420 size_t CharsPrinted = 0;
421 // Print the hex bytes for this line in groups
422 for (size_t I = 0; I < Line.size(); ++I, CharsPrinted += 2) {
423 if (I && (I % FB.ByteGroupSize) == 0) {
427 llvm::write_hex(*this, Line[I], HPS, 2);
431 // Print any spaces needed for any bytes that we didn't print on this
432 // line so that the ASCII bytes are correctly aligned.
433 assert(BlockCharWidth >= CharsPrinted);
434 indent(BlockCharWidth - CharsPrinted + 2);
437 // Print the ASCII char values for each byte on this line
438 for (uint8_t Byte : Line) {
440 *this << static_cast<char>(Byte);
447 Bytes = Bytes.drop_front(Line.size());
448 LineIndex += Line.size();
449 if (LineIndex < Size)
456 static raw_ostream &write_padding(raw_ostream &OS, unsigned NumChars) {
457 static const char Chars[] = {C, C, C, C, C, C, C, C, C, C, C, C, C, C, C, C,
458 C, C, C, C, C, C, C, C, C, C, C, C, C, C, C, C,
459 C, C, C, C, C, C, C, C, C, C, C, C, C, C, C, C,
460 C, C, C, C, C, C, C, C, C, C, C, C, C, C, C, C,
461 C, C, C, C, C, C, C, C, C, C, C, C, C, C, C, C};
463 // Usually the indentation is small, handle it with a fastpath.
464 if (NumChars < array_lengthof(Chars))
465 return OS.write(Chars, NumChars);
468 unsigned NumToWrite = std::min(NumChars,
469 (unsigned)array_lengthof(Chars)-1);
470 OS.write(Chars, NumToWrite);
471 NumChars -= NumToWrite;
476 /// indent - Insert 'NumSpaces' spaces.
477 raw_ostream &raw_ostream::indent(unsigned NumSpaces) {
478 return write_padding<' '>(*this, NumSpaces);
481 /// write_zeros - Insert 'NumZeros' nulls.
482 raw_ostream &raw_ostream::write_zeros(unsigned NumZeros) {
483 return write_padding<'\0'>(*this, NumZeros);
486 void raw_ostream::anchor() {}
488 //===----------------------------------------------------------------------===//
490 //===----------------------------------------------------------------------===//
492 // Out of line virtual method.
493 void format_object_base::home() {
496 //===----------------------------------------------------------------------===//
498 //===----------------------------------------------------------------------===//
500 static int getFD(StringRef Filename, std::error_code &EC,
501 sys::fs::CreationDisposition Disp, sys::fs::FileAccess Access,
502 sys::fs::OpenFlags Flags) {
503 assert((Access & sys::fs::FA_Write) &&
504 "Cannot make a raw_ostream from a read-only descriptor!");
506 // Handle "-" as stdout. Note that when we do this, we consider ourself
507 // the owner of stdout and may set the "binary" flag globally based on Flags.
508 if (Filename == "-") {
509 EC = std::error_code();
510 // If user requested binary then put stdout into binary mode if
512 if (!(Flags & sys::fs::OF_Text))
513 sys::ChangeStdoutToBinary();
514 return STDOUT_FILENO;
518 if (Access & sys::fs::FA_Read)
519 EC = sys::fs::openFileForReadWrite(Filename, FD, Disp, Flags);
521 EC = sys::fs::openFileForWrite(Filename, FD, Disp, Flags);
528 raw_fd_ostream::raw_fd_ostream(StringRef Filename, std::error_code &EC)
529 : raw_fd_ostream(Filename, EC, sys::fs::CD_CreateAlways, sys::fs::FA_Write,
532 raw_fd_ostream::raw_fd_ostream(StringRef Filename, std::error_code &EC,
533 sys::fs::CreationDisposition Disp)
534 : raw_fd_ostream(Filename, EC, Disp, sys::fs::FA_Write, sys::fs::OF_None) {}
536 raw_fd_ostream::raw_fd_ostream(StringRef Filename, std::error_code &EC,
537 sys::fs::FileAccess Access)
538 : raw_fd_ostream(Filename, EC, sys::fs::CD_CreateAlways, Access,
541 raw_fd_ostream::raw_fd_ostream(StringRef Filename, std::error_code &EC,
542 sys::fs::OpenFlags Flags)
543 : raw_fd_ostream(Filename, EC, sys::fs::CD_CreateAlways, sys::fs::FA_Write,
546 raw_fd_ostream::raw_fd_ostream(StringRef Filename, std::error_code &EC,
547 sys::fs::CreationDisposition Disp,
548 sys::fs::FileAccess Access,
549 sys::fs::OpenFlags Flags)
550 : raw_fd_ostream(getFD(Filename, EC, Disp, Access, Flags), true) {}
552 /// FD is the file descriptor that this writes to. If ShouldClose is true, this
553 /// closes the file when the stream is destroyed.
554 raw_fd_ostream::raw_fd_ostream(int fd, bool shouldClose, bool unbuffered)
555 : raw_pwrite_stream(unbuffered), FD(fd), ShouldClose(shouldClose) {
561 // Do not attempt to close stdout or stderr. We used to try to maintain the
562 // property that tools that support writing file to stdout should not also
563 // write informational output to stdout, but in practice we were never able to
564 // maintain this invariant. Many features have been added to LLVM and clang
565 // (-fdump-record-layouts, optimization remarks, etc) that print to stdout, so
566 // users must simply be aware that mixed output and remarks is a possibility.
567 if (FD <= STDERR_FILENO)
570 // Get the starting position.
571 off_t loc = ::lseek(FD, 0, SEEK_CUR);
573 // MSVCRT's _lseek(SEEK_CUR) doesn't return -1 for pipes.
574 sys::fs::file_status Status;
575 std::error_code EC = status(FD, Status);
576 SupportsSeeking = !EC && Status.type() == sys::fs::file_type::regular_file;
578 SupportsSeeking = loc != (off_t)-1;
580 if (!SupportsSeeking)
583 pos = static_cast<uint64_t>(loc);
586 raw_fd_ostream::~raw_fd_ostream() {
590 if (auto EC = sys::Process::SafelyCloseFileDescriptor(FD))
596 // On mingw, global dtors should not call exit().
597 // report_fatal_error() invokes exit(). We know report_fatal_error()
598 // might not write messages to stderr when any errors were detected
603 // If there are any pending errors, report them now. Clients wishing
604 // to avoid report_fatal_error calls should check for errors with
605 // has_error() and clear the error flag with clear_error() before
606 // destructing raw_ostream objects which may have errors.
608 report_fatal_error("IO failure on output stream: " + error().message(),
609 /*GenCrashDiag=*/false);
612 void raw_fd_ostream::write_impl(const char *Ptr, size_t Size) {
613 assert(FD >= 0 && "File already closed.");
616 // The maximum write size is limited to SSIZE_MAX because a write
617 // greater than SSIZE_MAX is implementation-defined in POSIX.
618 // Since SSIZE_MAX is not portable, we use SIZE_MAX >> 1 instead.
619 size_t MaxWriteSize = SIZE_MAX >> 1;
621 #if defined(__linux__)
622 // It is observed that Linux returns EINVAL for a very large write (>2G).
623 // Make it a reasonably small value.
624 MaxWriteSize = 1024 * 1024 * 1024;
625 #elif defined(_WIN32)
626 // Writing a large size of output to Windows console returns ENOMEM. It seems
627 // that, prior to Windows 8, WriteFile() is redirecting to WriteConsole(), and
628 // the latter has a size limit (66000 bytes or less, depending on heap usage).
629 if (::_isatty(FD) && !RunningWindows8OrGreater())
630 MaxWriteSize = 32767;
634 size_t ChunkSize = std::min(Size, MaxWriteSize);
635 ssize_t ret = ::write(FD, Ptr, ChunkSize);
638 // If it's a recoverable error, swallow it and retry the write.
640 // Ideally we wouldn't ever see EAGAIN or EWOULDBLOCK here, since
641 // raw_ostream isn't designed to do non-blocking I/O. However, some
642 // programs, such as old versions of bjam, have mistakenly used
643 // O_NONBLOCK. For compatibility, emulate blocking semantics by
644 // spinning until the write succeeds. If you don't want spinning,
645 // don't use O_NONBLOCK file descriptors with raw_ostream.
646 if (errno == EINTR || errno == EAGAIN
648 || errno == EWOULDBLOCK
653 // Otherwise it's a non-recoverable error. Note it and quit.
654 error_detected(std::error_code(errno, std::generic_category()));
658 // The write may have written some or all of the data. Update the
659 // size and buffer pointer to reflect the remainder that needs
660 // to be written. If there are no bytes left, we're done.
666 void raw_fd_ostream::close() {
670 if (auto EC = sys::Process::SafelyCloseFileDescriptor(FD))
675 uint64_t raw_fd_ostream::seek(uint64_t off) {
676 assert(SupportsSeeking && "Stream does not support seeking!");
679 pos = ::_lseeki64(FD, off, SEEK_SET);
680 #elif defined(HAVE_LSEEK64)
681 pos = ::lseek64(FD, off, SEEK_SET);
683 pos = ::lseek(FD, off, SEEK_SET);
685 if (pos == (uint64_t)-1)
686 error_detected(std::error_code(errno, std::generic_category()));
690 void raw_fd_ostream::pwrite_impl(const char *Ptr, size_t Size,
692 uint64_t Pos = tell();
698 size_t raw_fd_ostream::preferred_buffer_size() const {
699 #if !defined(_MSC_VER) && !defined(__MINGW32__) && !defined(__minix)
700 // Windows and Minix have no st_blksize.
701 assert(FD >= 0 && "File not yet open!");
703 if (fstat(FD, &statbuf) != 0)
706 // If this is a terminal, don't use buffering. Line buffering
707 // would be a more traditional thing to do, but it's not worth
709 if (S_ISCHR(statbuf.st_mode) && isatty(FD))
711 // Return the preferred block size.
712 return statbuf.st_blksize;
714 return raw_ostream::preferred_buffer_size();
718 raw_ostream &raw_fd_ostream::changeColor(enum Colors colors, bool bold,
720 if (sys::Process::ColorNeedsFlush())
722 const char *colorcode =
723 (colors == SAVEDCOLOR) ? sys::Process::OutputBold(bg)
724 : sys::Process::OutputColor(colors, bold, bg);
726 size_t len = strlen(colorcode);
727 write(colorcode, len);
728 // don't account colors towards output characters
734 raw_ostream &raw_fd_ostream::resetColor() {
735 if (sys::Process::ColorNeedsFlush())
737 const char *colorcode = sys::Process::ResetColor();
739 size_t len = strlen(colorcode);
740 write(colorcode, len);
741 // don't account colors towards output characters
747 raw_ostream &raw_fd_ostream::reverseColor() {
748 if (sys::Process::ColorNeedsFlush())
750 const char *colorcode = sys::Process::OutputReverse();
752 size_t len = strlen(colorcode);
753 write(colorcode, len);
754 // don't account colors towards output characters
760 bool raw_fd_ostream::is_displayed() const {
761 return sys::Process::FileDescriptorIsDisplayed(FD);
764 bool raw_fd_ostream::has_colors() const {
765 return sys::Process::FileDescriptorHasColors(FD);
768 void raw_fd_ostream::anchor() {}
770 //===----------------------------------------------------------------------===//
771 // outs(), errs(), nulls()
772 //===----------------------------------------------------------------------===//
774 /// outs() - This returns a reference to a raw_ostream for standard output.
775 /// Use it like: outs() << "foo" << "bar";
776 raw_ostream &llvm::outs() {
777 // Set buffer settings to model stdout behavior.
779 static raw_fd_ostream S("-", EC, sys::fs::F_None);
784 /// errs() - This returns a reference to a raw_ostream for standard error.
785 /// Use it like: errs() << "foo" << "bar";
786 raw_ostream &llvm::errs() {
787 // Set standard error to be unbuffered by default.
788 static raw_fd_ostream S(STDERR_FILENO, false, true);
792 /// nulls() - This returns a reference to a raw_ostream which discards output.
793 raw_ostream &llvm::nulls() {
794 static raw_null_ostream S;
798 //===----------------------------------------------------------------------===//
799 // raw_string_ostream
800 //===----------------------------------------------------------------------===//
802 raw_string_ostream::~raw_string_ostream() {
806 void raw_string_ostream::write_impl(const char *Ptr, size_t Size) {
807 OS.append(Ptr, Size);
810 //===----------------------------------------------------------------------===//
811 // raw_svector_ostream
812 //===----------------------------------------------------------------------===//
814 uint64_t raw_svector_ostream::current_pos() const { return OS.size(); }
816 void raw_svector_ostream::write_impl(const char *Ptr, size_t Size) {
817 OS.append(Ptr, Ptr + Size);
820 void raw_svector_ostream::pwrite_impl(const char *Ptr, size_t Size,
822 memcpy(OS.data() + Offset, Ptr, Size);
825 //===----------------------------------------------------------------------===//
827 //===----------------------------------------------------------------------===//
829 raw_null_ostream::~raw_null_ostream() {
831 // ~raw_ostream asserts that the buffer is empty. This isn't necessary
832 // with raw_null_ostream, but it's better to have raw_null_ostream follow
833 // the rules than to change the rules just for raw_null_ostream.
838 void raw_null_ostream::write_impl(const char *Ptr, size_t Size) {
841 uint64_t raw_null_ostream::current_pos() const {
845 void raw_null_ostream::pwrite_impl(const char *Ptr, size_t Size,
848 void raw_pwrite_stream::anchor() {}